Question

How do you write the domain of `f(x)=sqrt(5-4x)` in interval notation?

Answer 1

`Dom(f) = x ≤ 5/4`

Explanation:

For any radical function, the domain will be all values for which the radicand is non-negative.

`5 - 4x ≥ 0`

`5 ≥ 4x`

`x ≤ 5/4`